<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        * {
            margin: 0;
            padding: 0;
        }

        #box {
            width: 800px;
            height: 600px;
            position: relative;
            margin: 100px auto;
            background: #000000;
            border: 2px solid red;
            overflow: hidden;
        }

        .ball {
            width: 10px;
            height: 10px;
            border-radius: 50%;
            position: absolute;
            bottom: 0;

        }
    </style>
</head>

<body>
    <div id="box"></div>
    <script src="https://cdn.bootcdn.net/ajax/libs/jquery/3.5.1/jquery.min.js"></script>
    <script>
        function FireWork() {
            this.container = document.querySelector('#box');
            this.bindEvent()
        }
        FireWork.prototype.bindEvent = function () {
            var self = this;
            self.container.onclick = function (e) {
                var e = e || window.event;
                var fireWork = self.createFireWork();
                fireWork.style.left = e.offsetX + "px";
                $(fireWork).animate({
                    top: e.offsetY
                }, 2000,
                    function () {
                        fireWork.remove();
                    }
                )
            }
        }
        FireWork.prototype.createFireWork = function () {
            var div = document.createElement('div')
            div.className = 'ball'
            div.style.backgroundColor = "#" + Math.round(parseInt("ffffff", 16) * Math.random()).toString(16).padStart(6, "0");
            this.container.appendChild(div)
            return div
        }
        var fw = new FireWork();
    </script>
    </div>
</body>

</html>